50721433 has 4 divisors (see below), whose sum is σ = 57967360. Its totient is φ = 43475508.

The previous prime is 50721409. The next prime is 50721443. The reversal of 50721433 is 33412705.

50721433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50721433 - 2²¹ = 48624281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50721398 and 50721407.

It is not an unprimeable number, because it can be changed into a prime (50721403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3622953 + ... + 3622966.

It is an arithmetic number, because the mean of its divisors is an integer number (14491840).

Almost surely, 2^50721433 is an apocalyptic number.

It is an amenable number.

50721433 is a deficient number, since it is larger than the sum of its proper divisors (7245927).

50721433 is an equidigital number, since it uses as much as digits as its factorization.

50721433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7245926.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 50721433 is about 7121.8981318185. The cubic root of 50721433 is about 370.1665502924.

The spelling of 50721433 in words is "fifty million, seven hundred twenty-one thousand, four hundred thirty-three".